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參數(shù)資料
| 型號： | YMU757B-Q |
| 元件分類： | 音頻合成 |
| 英文描述： | TONE/MUSIC SYNTHESIZER, PQCC20 |
| 封裝： | QFN-20 |
| 文件頁數(shù)： | 34/44頁 |
| 文件大小： | 672K |
| 代理商： | YMU757B-Q |
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YMU757B
-4-
Block description
1) Serial interface
When the serial interface receives the serial data, it identifies the index data and transmits the control data to each
function block.
2) FIFO
The musical score data are stored temporarily in FIFO which can contain up to 32 musical score data. The musical
score data are processed are processed in the sequencer when they are generated as sounds and those that have been
processed are deleted one after another. When the remaining data amount in FIFO reaches the register setting (IRQ
point) or less, it outputs an interrupt signal to ask for the continuing musical score data to be fed.
3) Sequencer
When the sequencer receives the START command, it starts to read the musical score data which have been stored in
FIFO. The processed musical score data are deleted.
4) Timbre register
(Index 10h~2Fh)
The timbre data are stored in this register which can contain up to 8 timbres. Settings for this register must be made
before sound generation. Though it is initialized by hardware resetting, contents of a register aren't cleared, and the
value which had light last time is held as for the following.
Software reset (CLR bit of Index32h)
After the inside of the power going down mode and a release.
5) FM synthesizer
The timbres are synthesized and generated according to settings. Four sounds can be generated at the same time.
6) D/A, volume and amplifier
The outputs from the synthesizer are D/A converted and volume processed. After that, they are output from the
speaker or the earphone out terminal.
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